Wing nut fastener



FIG. 1 is an isometric view of a wing nut fastener showing my newdesign;

FIG. 2 is a top view of the wing nut fastener;

FIG. 3 is a front side view thereof;

FIG. 4 is a left view thereof;

FIG. 5 is a right view thereof; and,

FIG. 6 is a bottom view thereof.

I claim the ornamental design for a wing nut fastener, as shown anddescribed.